Ultralow friction polymer composites incorporated with mono-dispersed oil microcapsules

Lin ZHANG; Guoxin XIE; Shuai WU; Shiguang PENG; Xiaoqing ZHANG; Dan GUO; Shizhu WEN; Jianbin LUO

doi:10.1007/s40544-019-0312-4

Friction 2021, 9(1): 29-40 https://doi.org/10.1007/s40544-019-0312-4

Research Article |

Open Access | Issue | Published: 09 September 2019

Ultralow friction polymer composites incorporated with mono-dispersed oil microcapsules

Show Author's Information Hide Author's Information Lin ZHANG^¹, Guoxin XIE^¹(

), Shuai WU^¹, Shiguang PENG^¹, Xiaoqing ZHANG^², Dan GUO^¹, Shizhu WEN^¹, Jianbin LUO^¹(

)

1 State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

2 School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China

Keywords:

polymer composite, microcapsules, solvent evaporation, ultralow friction, boundary lubrication

Cite this article:

ZHANG L, XIE G, WU S, et al. Ultralow friction polymer composites incorporated with mono-dispersed oil microcapsules. Friction, 2021, 9(1): 29-40. https://doi.org/10.1007/s40544-019-0312-4

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Abstract

Ultralow friction polymer composites were prepared by adding oil-loaded microcapsules into epoxy (EP) resin. Mono-dispersed polystyrene (PS)/poly alpha olefin (PAO) microcapsules with a diameter of ~2 μm and a shell thickness of ~30 nm were prepared by solvent evaporation method in an oil-in-water emulsion. The lubrication behaviors of the EP resin composites with oil-loaded microcapsules have been investigated under different loads and sliding speeds. As compared with the pure EP resin, the friction coefficient of the composite could be reduced to 4% (from 0.71 to 0.028) and the wear rate could be decreased up to two orders of magnitude. It was demonstrated that the released PAO oil from the microcapsules during the friction process produced a boundary lubricating film, which could prevent the direct contact of two rubbing surfaces, and thus leading to an extremely low friction coefficient and wear rate. Moreover, the composites with microcapsules could achieve comparable lubrication properties to the case under the external lubrication condition, while the former case could effectively minimize the lubricant leakage and improve the lubrication efficiency.

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About this article

Ultralow friction polymer composites incorporated with mono-dispersed oil microcapsules

Show Author's information Hide Author's Information Lin ZHANG^¹, Guoxin XIE^¹(

), Shuai WU^¹, Shiguang PENG^¹, Xiaoqing ZHANG^², Dan GUO^¹, Shizhu WEN^¹, Jianbin LUO^¹(

)

1 State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

2 School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China

Abstract

Keywords: polymer composite, microcapsules, solvent evaporation, ultralow friction, boundary lubrication

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Publication history

Received: 15 April 2019

Revised: 18 June 2019

Accepted: 01 July 2019

Published: 09 September 2019

Issue date: February 2021

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51822505, 51811530014, and 51605008) and Beijing Natural Science Foundation of China (Grant No. 3182010).

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